Lap-back for bookbinding.



PATENTED JULY 30, 1907.

CARPENTIER. LAP BACK POR BOOKBINDING'.

APPLICATION FILED DEO. 14. 1906.

'2 SHEETS-SHEET 1.

lnesse' rtlz mit? rlrl'ls co., wAsNmaron, mc.

PAUL CARPENTIER, OF ZURICH, SWITZERLAND.

LAP-BACK FOR BOOKBINDING.

Specification of Letters Patent.

Patented July 30, 1907.

Application led December 14,1906. Serial No. 347,838.

To all whom 1t-may concern:

Be it known that I, PAUL CARPENTIER, a citizen of the Republic of Switzerland, residing at Zurich, Switzerland, have invented certain new and useful Improvements in Lap-Backs for Bookbinding; and I do hereby declare the following to be a iull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or gures of reference marked thereon, which form a part of this specification.

My invention relates to a sheet or book-binding, for the purpose o forming a lap-back. As is well known, a lap-back differs from an ordinary back, inasmuch as the various sections of the book, in the case of the former, are attached to double laps, instead of being secured as ordinarily, direct to the bands.

The invention is illustrated in the accompanying drawing, in which Figure I, is an elevation oi the sheet, Fig. 2, a cross section through a portion of thev same drawn to a larger scale. Figs. 3 and 4 are perspective views and Fig. 5 is a sectional view, illustrating the application of the sheet in binding.

As shown in Figs. 1 and 2, the binding sheet comprisesaplurality oi parallel sectionsl having lateral end connections 3, 4, forming a gap 2 between the adjacent sections. The sheet is pasted to a flexible backing 5, of any suitable material such as linen or canvas. Each section l has a central slit 6 which divides it -into two halves l and lb and in each hall, adjacent to the slit is formed a recess 8 and 8b respectively. After securing the binding sheet to the backing 5, the connections 3 and 4 may be cut ofi and the sections l and backing 5 trimmed to the size of the sheets 9 to be bound. The trimmed sheet is now folded at the gaps 2, and at the slits 6, in a zig-zag manner so as to form a double lap as shown in Fig. 3. The sheets 9 to be bound are secured to the flexible backing 5 at the gaps 2. Securing members such as loops 7, which may consist of metal staples or a exible material are mounted in the backing 5 at the slits 6 and are preierably located in such manner that the loop in one slit is displaced relatively to the loop of the adjacent slit, as shown in Fig.

4, but they may be disposed in any other or preferred manner. Strips l0 which serve as bands are drawn through the loops and owing to the provision oi the recesses 8a and 8" the loops 7 do not cause the back to bulge. These recesses have the further advantage of rendering the lap-back particularly pliable since they admit of the individual laps being bent independently of each other and a book may be readily opened at any place in the same uniform manner as shown in Fig. 5. This is especially the case when several recesses are provided at each side.

I claim:

1. A sheet for lap-back binders comprising a plurality of parallel sections each having a central longitudinal slit formed therein and a recess formed on each side of the latter.

2. A sheet for making a lap-back for book-binding, comprising a plurality of stout parallel sections connected at the ends so that they form a single sheet, each section being slit centrally and recessed at each side of the slit.

3. A lap-back binder comprising a flexible member, and a plurality of parallel sections secured to said member each having a central longitudinal slit and a recess on each side of the latter'. A

4. A lap-back binder comprising a llexible member, a plurality of longitudinally slitted sections mounted thereon to form' a gap between the adjacent sections whereby the flexible member may be folded to lay the sections together, and securing members located in the slits and projecting beyond the edges of the sections when they are folded.

5. A lap-back binder comprising a flexible member, a plurality of longitudinally slitted sections each having a recess formed therein on each side of the slit and secured to the exible members to form a gap between the adjacent sections, loops mounted in the flexible member projecting through the slits, and bands threaded through theloops.

6. ln combination, in a sheet for making a lap-back for book-binding, a plurality of stout parallel sections, connected at the ends so that they form a single sheet, each slit centrally to form a hinge and recessed at each side of the slit, and means located in the slits adapted to attach bindingbands.

In testimony that I claim the oregoing as my invention, I have signed my name in presence of two subscribing witnesses.

PAUL CARPENTIER.

Witnesses 1 A. LIEBERKNECHT, F. X. W. EAnzorrr.. 

